Leases - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2024	Jul. 31, 2023	Jan. 31, 2024
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term	5 years 9 months 18 days		5 years 9 months 18 days		6 years 2 months 12 days
Weighted average discount rate	2.85%		2.85%		2.86%
Public income remaining lease term			7 years 7 months 6 days
Sublease income	$ 2,000,000	$ 2,000,000	$ 4,000,000	$ 4,000,000
Sublease income payments			68,000,000
Sublease income payments, expect to receive, for fiscal 2025 through fiscal 2029	38,000,000		38,000,000
Sublease income payments, expect to receive, thereafter	30,000,000		30,000,000
Aggregate purchase commitments	$ 0		$ 0
Minimum
Lessee, Lease, Description [Line Items]
Operating lease remaining lease term	1 year		1 year
Lease renewal term	1 year		1 year
Optional termination period	1 year		1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating lease remaining lease term	66 years		66 years
Lease renewal term	8 years		8 years
Optional termination period	6 years		6 years